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LOTOS TECHNOLOGY
www.uwelding.com
Plasma Cutter TIG Stick Welder CT520D
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Lotos Technology CT520DQuick Setup
Power plug wiring:For either 110 or 220VAC, the GREEN wire is the ground wire. The WHITE and BLACK wires are hot wires.
For Plasma Cutting:
1. Wear a Lotos auto darkening plasma cutting helmet (Figure 1.1, not included in the box. To purchase, please go to our website.) to protect your eyes from harmful plasma cutting arc radiation and safety gloves to protect your hands during welding.
2. Connect the machine gas inlet (on the back of the machine, Figure 1.2) with an air compressor (Figure 1.3) and set the air pressure to 65-70 PSI. (The Air Regulator is optional if your air compressor has the capability to control output air pressure.)
Instructions
Figure 1.1
Figure 1.2 Figure 1.3
65 - 70 PSI
Power Cord
GasInlet
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3. Connect your plasma cutting torch and ground cable to the front panel of the machine. Make sure the ground cable is connected on the right hand side where the “+” sign is located. (Figure 1.4)
- Set TIG Weld /Stick Weld /Plasma Cut switch to Plasma Cut mode. - Set “2.5S/5S” to “2.5S” Mode. - Set “Machine/PEDAL” to “Machine” Mode. - Adjust Current Dial between 10 and 50 amps.
4. Attach the ground clamp to the metal you want to cut. Grind the metal to make sure the clamp is securely attached to the work piece. Press the trigger of the torch and make sure the air is flowing. Finally, move the torch head to the work piece and start cutting.
5. Change your consumables (tip, electrode, ring, and cup) if they are worn out. The consumables’ type is LCON. If you want to cut the perfect circle or perfect straight line, order a Lotos LCK roller guider compass kits from our website www.uwelding.com.
1. Wear our auto darkening helmet and gloves to protect your eyes and hands from any harmful welding arc. (Please see step 1 in Plasma Cutting.)
2. Connect the machine gas inlet (on the back of the machine, Figure 1.5) to the argon regulator and adjust the knob to set gas pressure between 15 and 20 min/L (an argon regulator is necessary, Figure 1.6.)
For TIG Welding:
Figure 1.4
STICKWeldingClamp Plasma
TorchOutput
5-pin Switch
Plug
GroundCable
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a) If you switch from plasma cutting to TIG welding quite often, consider buying a LOTOS 3 way valve kit to connect both the argon tank (Figure 1.7) and the air compressor simultaneously.
- Connect your TIG torch and ground cable to the front panel of the machine.- Make sure the ground cable is connected on the right hand side where the “+” sign is located. - Set TIG Weld/Stick Weld/Plasma Cut switch to TIG Weld mode (refer to Figure 1.4, page 2). - Set “2.5S/5S” to “2.5S” mode.- Set “Machine/PEDAL” to “Machine” mode.- Adjust current dial from 10 to 200 amps (Figure 1.8).
Figure 1.5 Figure 1.6
Figure 1.7
Figure 1.8
Outputfrom Air
Compressor
ArgonRegulator
ArgonGas
Machine
GasInlet
Air Compressor
1 5 - 2 0 min/L
5-pin Switch
Plug
TIGTorch
Output
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b) If you want to dynamically control the welding heat, please use a foot pedal (not included in the box. To purchase, please go to our website). Then connect the “on/off” connector to your foot pedal and leave the wire of the TIG torch unplugged.
- Set TIG Weld/Stick Weld/Plasma Cut switch to TIG Weld mode (refer to Figure 1.4, page 2). - Set “2.5S/5S” to “2.5S” mode.- Set “Machine/PEDAL” to “Pedal” mode.- Adjust current dial between 10 and 200 Amp (Figure 1.9).
3. TIG torch head parts (Figure 1.10) and assembly (Figure 1.11) (The tungsten is not included in the picture; please buy proper DC Lotos tungsten electrodes.) Grind and sharpen the tungsten before first use.
Figure 1.9
Figure 1.10 Figure 1.11
Foot Pedalwith
Amp Adjusts
GroundCable5-pin
Foot PedalPlug
TIG TorchOutput
Unplugged
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For Stick/Arc/MMA Welding:
1. Wear our auto darkening welding helmet and gloves to protect your eyes and hands from any harmful welding arc. (Please see step 1 in Plasma Cutting.)
2. You don’t need to connect the machine to any gas or air supply. It’s a plug and play. Panel connection instructions: - Set TIG Weld/Stick Weld/Plasma Cut switch to Stick Weld mode (refer to Figure 1.4, page 2). - Set “2.5S/5S” to “2.5S” mode. - Set “Machine/PEDAL” to “Machine” mode. - Adjust current dial between 10 and 200 amps (Figure 1.12).
IMPORTANT: To avoid damaging the machine, please be sure to turn off the machine when you switch from one function to another.
All accessories and consumables can be purchased at www.uwelding.com or Lotos’s authorized resellers.
Thank you for your business!
Figure 1.12
GroundCable
StickWeldingClamp
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LOTOS CT520DUser ManualVersion: 3.0, June 2017
copyright @ Lotos Technology www.uwelding.com is operated by Lotos Technology
For more information and more of our products, please visit our website at
http://www.uwelding.com/
Introduction 6
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Precautions 7
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Caution Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Avoiding Fatal Electric Shock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Avoiding Harmful Smoke, Gases, and Vapors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Avoiding Harmful Arc Emissions/Rays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Avoiding Harmful Noises . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fire or Explosion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Burn Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Protecting Eyes from Flying Metal or Dirt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pacemakers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cylinder Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Equipment 9
General Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Main Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Adjustor Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air Regulator Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Connecting Cables to Machine. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Instruction Notes 20
Working Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents
77777788888
9 9 9121213151616
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20202121
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Gas Regulator Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Argon Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17Tips for Cutting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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6
Introduction
OverviewDear Valued Customer:
Thank you for purchasing a Lotos Technology plasma cutter! Feel free to check out our other products atwww.uwelding.com.
This User Manual documents policies and procedures for proper operation of the equipment.
IMPORTANT: Be sure to review the contents of this manual before attempting to operate the equipment. This manual should be located where it can be easily referenced by all users of the machine.
AudienceThis manual assumes that all individuals reading the manual and using the welder/cutter are able, qualified, and/or certified to operate this type of machinery.
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Safety Precautions - Read Before UsingOverview
Caution Recommendations
Arc rays from the welding process pro-duce intense visible and invisible rays that can burn eyes and skin. Sparks fly off from the weld.
CAUTION: Welding and arc cutting can cause bodily injury.
• Connect the machine to a UL-approved outlet only. Do not hard wire the machine directly to the power source.• Wear safety goggles at all times. This will dark- en the arc that is generated by the machine and protect your eyes from harmful rays. • All machine operators should be technically certified for welding/cutting.
Avoiding Harmful Smoke, Gases, and Vapors that can injure or kill.
Avoiding Harmful Arc Emissions/Rays that can burn eyes and skin.
Avoiding Fatal Electric Shock
Protect yourself and others from injury — read and follow these precautions.
Welding produces fumes and gases. Breathing these fumes and gases can be hazardous to your health.
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• Do NOT switch off the machine while machine is in operation for internal circuitry can be damaged.
• Wear appropriate clothing and a welding or cutting mask to protect your eyes and skin.
• Use appropriate screen or curtain to prevent emissions from reaching individuals near the work area.• Ensure that your working area contains no flammable items; and that none are nearby. Caution: Welding and cutting spray can ignite.
Avoiding Harmful Noises that can damage hearing.
Noise from some processes can damage hearing.
• Wear protective earplugs while operating machine.
• Isolate yourself from both the earth and the work piece.
• Make sure that your working area is nonflammable and explosive-free.
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Burn Protection: HOT PARTS can cause serious burns.
Protect eyes from FLYING METAL or DIRT.
PACEMAKERS AND WELDING: MAGNETIC FIELDS can affect implanted devices.
CYLINDER HANDLING: it can explode if damaged.
Welding or Cutting can cause Fire or Explosion.
If you encounter any difficulties during set up or operation: • Consult this manual. • Contact Lotos Customer Service by visiting http://www.uwelding.com/about-us/contact-us/.
The work piece and equipment get hot. The hot metal, hot work piece, and hot equipment can cause burns.
• Welding, chipping, wire brushing, and grinding cause sparks and flying metal.
Electric arc welding and cutting processes produce intense electric and magnetic (electromagnetic)fields. The function of pacemakers can be affected by strong electro-magnetic fields.
Shielding gas cylinders contain gas under high pressure. If damaged, a cylinder can explode. Be sure to treat gas cylinders carefully.
Welding, cutting, and allied pro-cesses can cause fire or explosion if precautionary measures are not followed.
• Use approved helmets or hand shields that provide protection for the face, neck, etc. • Wear approved safety goggles or glasses with side shields, even under your helmet.
• Wear approved safety glasses with side shields, even under your welding helmet.
• Persons with a pacemaker should not go near welding or cutting operations until they have consulted their doctors and obtained information from the manufacturer of the device.
• Protect compressed gas cylinders from excessive heat, mechanical shocks, physical damage, slag, open flames, sparks, and arcs.• Install cylinders in an upright position by securing to a stationary support or cylinder rack to prevent falling or tipping.
• Develop adequate procedures, and use proper equipment to do the job safely.
• Keep cylinders away from any welding or other electrical circuits.
• Wear dry, hole-free insulated gloves.
• Remove combustible materials from a sphere with a minimum radius of 35 feet around the work area or move the work to a location well away from combustible materials.
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EquipmentGeneral OverviewManufactured with advanced inverter technology, the CT520D multipurpose unit includes the following features: stable output, reliable, completely portable, high-efficiency and low noise generated while cutting.
Main Characteristics
The LOTOS CT520D series DC TIG, MMA, and plasma cutter allows you to weld stainless steel, alloy steel and carbon steel and other nonferrous metals.
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• Stabilization• Reliability• Portability
• Power efficiency and low noise output• High cutting speed• Smooth cuts
General
Model name CT520D
Functions
50 A Plasma Cutter200 A TIG Welder
200 A STICK Welder
Dimension with handleWeight 32 lbs (14.5 kg)
Input voltage 110-220 V, 1-PH, 50/60 HzPower supply type Inverter - IGBTHousing protection IP21
Insulation BEfficiency 85%
Accessories
Plasma cutting torch 50 A, 12.5 ft. (3.81m)
TIG welding torch 200 A 12.9 ft. (3.93m)Arc/Stick clamp 200 A 6.5 ft. (1.98m)Argon regulator 0-250 psi
Air regulator 0-150 psi
Specifications
The CT520D multipurpose unit offers a variety of welding and cutting aspects. It is able to cut all types
of metal up to 1/2’’ with the 50A Plasma cutting function. This LOTOS multi-process welder can switch
between TIG Weld and STICK Weld quickly and easily. With a hand carrying weight of 32lbs, the unit is
portable and reliable featuring a duty cycle of 60% at max amps on all processes.
Plasma Cutting
Rated input power requirement 220 V, 1-PH, 35 A110 V, 1-PH, 45 A
Output current 10-50 A @220V10-25 A @110V
Duty cycle @ 40°C (104°F) 60% @ 50 A100% @ 40 A
Gas supply Clean, dry, oil-free airRecommended gas inlet
flow rate / pressure3.6 scfm @ 65 psi
80L/minMax rated cutting thickness 1/2 inches (12.7mm)
DCTIG
Welding
Rated input power requirement 220 V, 1-PH, 30 A110 V, 1-PH, 40 A
Output current 10-200 A @ 220V10-100 A @ 110V
Material can weld Steel, Stainless, Moly, Ferrous
Duty cycle @ 40°C (104°F) 60% @ 200 A100% @ 150 A
No load voltage 62 VWorking voltage 16.9 V
Gas supply Clean, dry, oil-free argon gasStarting mechanism High Frequency Start / HF Welding
Recommended gas inletflow rate 2-5 L/M
DCStick
Welding
Rated input power requirement 220 V, 1-PH, 35 A 110 V, 1-PH, 50 A
Output current 10-200 A @ 220V10-80 A @ 110V
Material can weld Steel, Stainless, Moly, Ferrous
Duty cycle @ 40°C (104°F) 60% @ 200 A100% @ 95 A
No load voltage 62 VWorking voltage 25 V
Starting mechanism High Frequency Start / HF Welding
Specifications
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Torch Type Model Amperage Consumables Type
5 prong LCON Cutting Torch CL0105 50
LCON0120LCON0140LCON0190
Extended 5 prong LCON cutting
torchCL0205 50
LCON0220LCON0240LCON0290
Part Number Nozzle Electrode Shield Cup Swirl Ring Package Type Total Pieces
LCON0120 LN01 LE01 LC01 LR01 LN01 x 10, LE01 x 10 20
LCON0140 LN01 LE01 LC01 LR01
LN01 x 10, LE01 x 10, LR01 x 10, LC01 x 10
40
LCON0190 LN01 LE01 LC01 LR01
LN01 x 40, LE01 x 20, LR01 x 20, LC01 x 10
90
LCON0220 LN02 LE02 LC02 LR02 LN02 x 10, LE02 x 10 20
LCON0240 LN02 LE02 LC02 LR02
LN02 x 10, LE02 x 10, LR02 x 10, LC02 x 10
40
LCON0290 LN02 LE02 LC02 LR02
LN02 x 40, LE02 x 20, LR02 x 20,LC02 x 10
90
Torch Type
Consumables Package
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Figure 2.1: Adjustor Diagram 1
Figure 2.2: Adjustor Diagram 2
Figure 2.3: Air Regulator Configuration
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Amp Display Amp Adjusting2-step &
5-step Switch
Machine/Pedal Switch
FunctionSwitch
ProblemIndicator
Connect toAir Compressor
AirRegulator
PowerCord
PowerSwitch
(TIG)(Stick)
(Cutter)
ProblemIndicator
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Figure 2.4: Plasma Cutting Diagram
Figure 2.5: TIG Welding without Foot Pedal Diagram
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PowerCord
Adjust to Plasma Cut
Output
Output5-pin Plug
5-pin Plug
GroundCable
Ground Clamp
Clamp
WorkPiece
WorkPiece
Cutting Torch
TIG Torch
220V Round Plug
220V Round Plug
Air Compressor
Argon Tank
Argon Hose
Argon Regulator
PowerCord
Gas & Power
Gas & Power Ground
Figure 2.7: Arc/Stick/MMA Welding Diagram
Figure 2.6: TIG Welding with Foot Pedal Diagram
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220V Round Plug
Argon Tank
Argon Regulator
Argon Hose
PowerCord
Gas & Power Output
5-pin Plug (unplugged)
Foot Pedal with 5-pin Plug
WorkPiece
Ground Clamp
TIG Torch
220V Round Plug
WorkPiece
Ground Clamp (+)
Arc Handler (-)
Ground Clamp (+)
Work Piece
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INSTALLATION
Connect this welding & cutting equipment with a power supply of 110 or 220V AC.
For 110VAC,- The green wire with yellow stripe is the ground wire- The red/brown wire is the hot wire- The blue/black wire is the neutral wireFor 220VAC,- The green wire with yellow stripe is the ground wire- The red/brown wire is positive 220VAC- The blue/black wire is negative 220VACConnect the earth terminal with the earth cable (minimum diameter of 2.5 mm2.)
1. Install welding torch according to the quick setup guide. 2. Connect the one-knob connector, air plug to the corresponding connector on the panel board; and fasten the screw. 3. Plug the air plug of the back cable to “+” of the air socket on the panel board; and fasten it in clockwise. Connect earth clamp with work piece.
If the power switch is on, the built-in fan starts working and the current meter displays the current value.
The function switch enables the machine to alternate between MMA, TIG, and CUT welding according to the practical welding task requirement.
1. TIG Welding Function- Connect the copper nozzle in the back of the machine to the argon tank with the hose. The gas supply system includes the gas bottle, air regulator, and gas hose. Connect the parts of the gas system firmly to prevent gas leakage. - Install the argon torch according to the Figure 3.2. - Connect the copper screw on the cutting torch to the output terminal of the one-knob of the front panel; and fasten it clockwise to avoid gas leakage. - Connect the plug of the closed circuit to the “+” socket on the panel board. Connect the earth clamp to the work piece.
Function Switch
Power Cord Plug Wiring
Connection of the Output Cables
Power Supply Switch
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Function Switch
Welding Current Output Setting
Air/Argon Regulator Installation
2. MMA Function- Connect the plug of the electrode holder to the “+” socket on the front panel. - Connect the plug of the ground clamp to the “-” socket on the front panel.
3. Plasma Cutting Function- Use the gas hose to connect to one of the terminals on the air regulator and connect the other terminals to the copper tub. - Connect the copper nut of the cutting torch to the knob on the panel board. Connect the plug of the ground clamp to the “-”socket on the front panel.
Based on your application, set the current output to “ARC,” “TIG,” or “CUT.”
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25
20
15
10
5
1
SHUTREGULATORAROPEN
Figure 3.1: Gas Regulator Installation
Figure 3.2: Argon Installation
(Unassembled)
(Assembled)
Tips For Cutting
1. Hold the torch at an approximate 30° to the workpiece, let the copper tip directly
contact with the workpiece.
2. Fire the torch. Slowly rotate the torch to from 30° to 90°.
3. Hold the torch in place while continuing to press the trigger. When the arc goes
completely through the workpiece, then the arc has pierced the material.
CAUTION: If cutting functions improperly, try to remove oxidization of the electrode on the torch with sand paper.
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OPERATION
TIG Welding Function
1) While this welding & cutting equipment is operated, the power supply indicator is on; and the built-in fan will function.2) Switch to the TIG welding function mode.3) Press the gas release button and modulate the volume of gas output to the required value.4) Press the button on the welding torch, and the electromagnetic valve functions. The sound of releasing electricity is audible, and there is gas coming out of the welding torch.
Please note: Before the initial welding operation, press the welding torch button for several seconds in order to remove the gas inside the gas tub, and the welding operation can begin. There is gas output within a few seconds after the welding operation. It is a special design to protect the welding point before it cools down. Therefore, after the arc is gone, maintain the welding position until the heat produced during the welding operation dissipates.
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MMA Function
1) Switch to MMA welding mode.2) While this welding & cutting equipment is operated, the power supply indicator is on and the built-in fan will function.3) According to the thickness of the work piece, adjust the welding current output and choose the rod, then the MMA welding can begin.
5) The welding current output is adjustable, according to the thickness of the welding material and required craftsmanship.6) Maintain a distance of 1-4mm between the tungsten electrode and the work piece. Press the welding torch button. HF electricity will release between the welding electrode and the work piece. After the arc starts, the splash of the HF arc will vanish and the welding operation can begin.
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1) Switch to the plasma-cutting mode.2) While this welding & cutting equipment is operated, the power supply indicator is on and the built-in fan will function.3) Release the regulator valve, and modulate the pressure and volume of output gas.4) Press the cutting torch button. The sound of releasing electricity is audible and there is gas coming out of the welding torch.5) According to the thickness of the work piece, adjust the current output, and then the plasma cutting can begin.6) Put the nozzle of the cutting torch to the work piece and press the welding torch button. The sound of the HF arc vanishes and the cutting operation can begin. After the arc starts, maintain a distance of about 1mm in order to protect the nozzle from possible damage.7) In case of difficulty with starting the arc, it is recommended to reduce the pressure of the gas output.8) If the nozzle is damaged, adjust the pressure of the gas output.
Plasma Cutting Function
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Instruction Notes
1. The location in which this welding & cutting equipment is installed should be free of dust, corrosive chemical gases, flammable gases or materials, and of be at no more than 80% humidity.2. Avoid welding & cutting in the open air unless sheltered from the sun, rain, and snow. The temperature of the working environment should be maintained within -10°C to +40°C.3. Keep this welding & cutting equipment 30cm away from the wall.4. Ensure the working environment has good ventilation.
a) VentilationThis welding & cutting equipment is small, compact in structure, and has excellent current output performance. Fans are required to remove heat generated by this cutting equipment while the machine is being operated.
Cautions: Maintain good ventilation of the louvers of this welding & cutting equipment. The minimumdistance between this welding & cutting equipment and any other object in or near the working areashould be 30 cm. Good ventilation is of critical importance for the normal performance and service lifeof this welding & cutting equipment.
b) Welding cannot be performed if equipment is overloaded.A sudden halt may occur while the cutting operation is carried out if the machine is in over-load status. Under this circumstance, it is unnecessary to restart the equipment. Keep the built-in fan running to bring down the temperature inside the equipment.
c) Beware of over-voltage.Regarding the power supply voltage range of the welding & cutting machine, please refer to the “Specifications” table. This equipment has automatic voltage compensation, which enables it to maintain the voltage within the given range. If the power supply input voltage current exceeds the stipulated value, it is possible to damage the components of this equipment.
d) An earth terminal is available for this welding & cutting equipment.Connect the earth cable to avoid static and electric shock. It is not recommended to touch the output terminal while welding and cutting. An electric shock may occur.
Safety
Working Environment
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Maintenance
Troubleshooting
Exposure to extremely dusty, damp, or corrosive air is damaging to this welding & cutting machine.
In order to prevent any possible failure or fault of this equipment, clean the dust out at regular intervals with clean and dry compressed air of required pressure.
Please note: Lack of maintenance can lead to the unavailability and cancellation of the guarantee;the guarantee of this equipment will no longer be available if attempts have been made to take the machine apart or the factory-made sealing of the machine has been opened.
The following trouble shooting guide is for your reference only. Lotos Technology will NOT take any liability or responsibility for any injury or damage caused in such action(s). Always turn off electrical power and air supply before performing inspection and reconnection.
CAUTIONS: Only qualified technicians are authorized to undertake the repair of this equipment in the case of machine failure.
Fault Symptoms Rectification
1. While this welding and cutting equipment is off,
the built-in fan is not functioning, and there is no output.
1. Possible damage of power supply switch; fix the damage if necessary.2. Possible unavailability of power supply. Check for failure in power supply.3. Possible short-circuit of the input cable. Check it and repair it if necessary.
2. While this welding and cutting equipment is on,
the pilot lamp is on, no output,
built-in fan unavailable.
1. Possible misconnection with input of 380V, and occurrence of over voltage protection status. Reconnect with input of 220V, and restart.2. Possible unstable input due to the unavailable input cable or possible connection unavailable spells it's being of over-voltage protection status.3. Frequently switching on and off of this welding equipmentin a short period leads this equipment's being of over-voltage protection. Switch off this welding machine and wait for at least 3 minutes, then restart this welding equipment.4. Possible unavailable of the connection of switch and bottom PCB. Reconnect it.5. The 24V relay of bottom PCB is possibly damaged. Replaced it if necessary.
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Fault Symptoms Rectification
3. While this equipment is on, the built-in fan functions, the fault indicator is off,
no HF electricity releasing, arc does not start.
1. The normal voltage of positive and negative pole of boardVH-07 should be DC 380V.1.1 Possible short circuit, and possible misconnection of silicon bridge with the PCB.1.2 Possible electricity leakage of capacitors; replace them ifnecessary.2. The green light indicator of secondary power supply of top PCBshould be on. Otherwise, it indicates that the secondary power supply is not functioning. Check whether the connection is available. If fault cannot be rectified, please contact supplier forfurther advice.3. Possible unavailability of connection inside the equipment. Check and reconnect if necessary.4. Possible malfunction of control circuit. Check and contact the supplier for further advice.5. Possible damage of the welding torch. Replace it if necessary.
4. While this equipment is on, fault indicator is off,
HF electricity is releasing, and welding current output is unavailable.
1. Possible disconnection of welding torch cable.2. Possible disconnection of earth cable, or misconnection of the earth cable and work piece.3. The connection between positive output terminal or the gas or electricity output terminal and this welding equipment is possiblyunavailable. Reconnect them if necessary.
5. While this equipment is on, the fault indicator is off, no electricity
releasing, and arc starts.
1. The cable connection between the transformer of arc starting and power PCB is possibly unavailable. Check and reconnect it.2. Possible oxidization of electricity releasing parts or the distance is larger than the maximum distance allowed. Remove the oxidization of the electricity releasing parts and adjust the distance of the electricity releasing parts to range of 1mm.3. Possible damage to MMA/TIG switch. Replace them ifnecessary.4. Components of HF arc starting circuit are possibly damaged.Check and replace them if necessary.
6. While this equipment is on, the fault indicator is on, and there is no output.
1. It is possible the machine is in over-current protection status. Switch off the power supply, wait until the fault indicator is off, and restart the welding equipment. 2. It is possible the machine is in over-heating protection status. Wait until the fault indicator is off, and the welding operation can begin.3. Possible damage of feed-back circuit. Compensate the fault if necessary.
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Fault Symptoms Rectification
7. Unstable current output during the welding operation, and the potentiometer
is unavailable.
1. Possible damage of 1K resistance. Replace it if necessary.2. The connection of this welding equipment is not available.
8. Excessive splash generated during welding operation. It is difficult to weld
with alkaline rod.
1. Misconnection of earth cable and welding torch cable.2. Reconnect them.
9. Insufficiency in welding and cutting performance, and the arc is not stable.
1. Possible insufficiency of voltage input.2. The connection of earth cable is unavailable. Reconnect it.3. The gas supply system is unavailable. Examine it and fix it if necessary.4. There is possible deficiency of electrode of cutting torch.5. The filter capacitor of this welding and cutting equipment is notavailable. Replace it if necessary.6. The rod is not available due to the fact that the rod has becomedamp or damaged.7. The current is not available to start the arc.
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